package com.sky.service.impl;

import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.result.Result;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;


import java.sql.Timestamp;
import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // 进行md5加密，然后再进行比对
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     * 新增员工
     *
     * @param employeeDTO
     * @return
     */
    @Override
    public void insertEmployee(EmployeeDTO employeeDTO) {
        // 如果员工账号已经存在，使用全局异常将信息抛出

        // 拷贝属性
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO, employee);

        // 设置默认密码
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));

        // 设置账户默认状态
        employee.setStatus(StatusConstant.ENABLE);

        // 设置员工创建时间和更新时间
//        LocalDateTime nowTime = LocalDateTime.now();
//        employee.setCreateTime(nowTime);
//        employee.setUpdateTime(nowTime);

        // 设置员工创建者和更新者
//        employee.setCreateUser(BaseContext.getCurrentId());
//        employee.setUpdateUser(BaseContext.getCurrentId());

        employeeMapper.insertEmployee(employee);
    }



    /**
     * 员工分页查询
     * @param employeePageQueryDTO
     * @return
     */
    @Override
    public PageResult selectByPage(EmployeePageQueryDTO employeePageQueryDTO) {
        // 获取请求内容
        int page = employeePageQueryDTO.getPage();
        int pageSize = employeePageQueryDTO.getPageSize();

        // 分页插件
        PageHelper.startPage(page, pageSize);
        List<Employee> employees = employeeMapper.queryByPage(employeePageQueryDTO);
        PageInfo<Employee> employeePageInfo = new PageInfo<>(employees);

        // 获取总页码和当前分页列表
        long total = employeePageInfo.getTotal();
        List<Employee> list = employeePageInfo.getList();

        PageResult pageResult = new PageResult();
        pageResult.setTotal(total);
        pageResult.setRecords(list);

        return pageResult;
    }


    /**
     * 启用/禁用员工
     * @param status
     * @param id
     */
    @Override
    public void enableEmployee(Integer status, Long id) {
        Employee employee = Employee.builder()
                                    .status(status)
                                    .id(id)
                                    .build();
        employeeMapper.update(employee);
    }

    /**
     * 根据员工id查询信息
     * @param id
     * @return
     */
    @Override
    public EmployeeDTO getEmployeeById(Long id) {
        EmployeeDTO employeeDTO = employeeMapper.getById(id);
        return employeeDTO;
    }

    /**
     * 更新员工信息
     * @param employeeDTO
     */
    @Override
    public void updateEmployee(EmployeeDTO employeeDTO) {
        // 修改人id
//        Long updateUser = BaseContext.getCurrentId();
        // 更新时间
//        LocalDateTime updateTime = LocalDateTime.now();

        Employee employee = Employee.builder()
//                                    .updateUser(updateUser)
//                                    .updateTime(updateTime)
                                    .build();
        // 同名属性赋值
        BeanUtils.copyProperties(employeeDTO, employee);

        employeeMapper.update(employee);
    }

}
